body{
    margin: 0;
    padding: 0;
    }
#header{
    margin: 0;
    width: 100%;
    height: 15%;
    min-height: 120px;
    }
#content{
    height: 85%;
    width: 100%;
    text-align: left;
    min-height: 700px;
}
#content2{
    width: 100%;
    text-align: left;
    min-height: 900px;
}
.tit{
    position: absolute;
    height: 20px;
    top: 50%;
    left: 10px;
    margin-top: -10px;
}